- A15 h
- B
- C30 h
- D
Step-by-Step Solution
First half at h. Then net : half takes 15 h. Total h. (30 h has C open from the start.)
Answer: B)
Pipe A fills a tank in 15 hours, pipe B in 20 hours, and outlet C empties it in 12 hours. A and B are opened on the empty tank, and C is opened when the tank is half full. How long does the tank take to fill?
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